LEAUDIO XDUOO XD05 Plus 2 Portable DAC Headphone Amplifier User Manual

1. Introduction

The LEAUDIO XDUOO XD05 Plus 2 is a high-performance portable Digital-to-Analog Converter (DAC) and headphone amplifier designed to deliver exceptional audio quality. It features advanced decoding capabilities, powerful output, and versatile connectivity options for various audio sources and headphones.

Figure 1: Top view of the XDUOO XD05 Plus 2, highlighting its compact design and model branding.

2. Package Contents

Please check the package for the following items:

• XDUOO XD05 Plus 2 Portable DAC Headphone Amplifier
• USB cable
• User Manual (this document)

3. Device Layout

Figure 2: Front panel controls including the headphone output, OLED display, Damping switch, Turbo switch, and Volume/Input knob.

Figure 3: Rear panel connections featuring AUX In/Out, USB In, UAC 1.0/2.0 switch, Charge port, and Digital In (Optical/Coaxial).

Figure 4: Side panel buttons for EQ, Filter, and Bluetooth functions.

4. Setup and Connections

4.1 Charging the Device

Connect the provided USB cable to the 'CHARGE' port on the rear panel (Figure 3) and plug the other end into a USB power adapter (not included) or a computer's USB port. The charging time is approximately 3 hours for fast charging and 5 hours for slow charging.

4.2 Connecting to Audio Sources

The XD05 Plus 2 offers multiple input options:

• USB Input: Connect to computers (Windows/Linux/Mac OSX), smartphones (iOS/Android), or other USB audio sources using the 'USB IN' port (Figure 3). Ensure the UAC switch is set to the appropriate mode (UAC 1.0 or UAC 2.0) for your device.
• Digital Input (Optical/Coaxial): Connect to desktop CDs, Hi-Fi players, or digital turntables via the 'DIGITAL IN' port (Figure 3).
• Bluetooth Input: For wireless audio streaming, refer to Section 5.4 for Bluetooth pairing instructions.
• AUX In/Out: Use the 'AUX IN/OUT' port (Figure 3) for analog input or output connections.

4.3 Connecting Headphones

Plug your headphones into the 'PHONE' output jack on the front panel (Figure 2).

5. Operating Instructions

5.1 Power On/Off and Input Selection

Press and hold the power button (located near the 'PHONE' jack, Figure 2) to turn the device on or off. Rotate the 'VOL & INPUT' knob (Figure 2) to adjust the volume. Press the 'VOL & INPUT' knob to cycle through available input sources (USB, Optical, Coaxial, Bluetooth, AUX).

5.2 Volume Control

The device features a 99-level digital volume adjustment, ensuring balanced left and right channels at any volume setting. Rotate the 'VOL & INPUT' knob to precisely set your desired listening level.

5.3 Sound Adjustments (EQ, Filter, Damping, Turbo)

Figure 5: Detailed view of sound adjustment controls and their functions.

• EQ (Equalizer): Press the 'EQ' button (Figure 4) to adjust the sense of hearing and tailor the sound to your preference.
• Filter: Press the 'FILTER' button (Figure 4) to slightly change the sound quality by adjusting the DAC filter settings.
• Damping: Use the 'DAMPING' switch (Figure 2) to set the output impedance, suitable for high-sensitivity and low-resistance headphones.
• Turbo: Use the 'TURBO' switch (Figure 2) to set the output power, allowing the device to better drive different types of headphones.

5.4 Bluetooth Pairing

To pair your device via Bluetooth 5.1:

1. Ensure the XD05 Plus 2 is powered on and Bluetooth input is selected.
2. Press the 'Bluetooth' button (Figure 4) to enter pairing mode. The Bluetooth indicator on the OLED screen will flash.
3. On your source device (e.g., smartphone, tablet), search for available Bluetooth devices and select "XDUOO XD05 Plus 2".
4. Once connected, the Bluetooth indicator will stop flashing.

Supported Bluetooth formats include AAC, SBC, aptX, aptX LL, aptX HD, and LDAC.

5.5 Replacing the Amplifier Chip

The amplifier chip is user-replaceable, allowing for customization of your audio experience. Refer to the manufacturer's guidelines or a qualified technician for instructions on safely replacing the op-amp chips.

6. Specifications

7. Maintenance

To ensure the longevity and optimal performance of your XDUOO XD05 Plus 2, follow these maintenance guidelines:

• Keep the device clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
• Protect the device from extreme temperatures, direct sunlight, and moisture.
• Avoid dropping or subjecting the device to strong impacts.
• When not in use for extended periods, store the device in a cool, dry place.

8. Troubleshooting

If you encounter issues with your XDUOO XD05 Plus 2, please refer to the following common troubleshooting steps:

• No Sound:
  • Check if the device is powered on.
  • Ensure headphones are properly connected.
  • Verify the correct input source is selected.
  • Adjust the volume level.
  • Check the audio source device for proper playback and volume settings.
• Poor Sound Quality:
  • Ensure all cables are securely connected.
  • Try a different audio cable or source.
  • Check EQ and Filter settings; reset them to default if necessary.
  • Ensure the UAC switch is set correctly for your USB connection.
• Bluetooth Connection Issues:
  • Ensure the device is in Bluetooth pairing mode.
  • Move the source device closer to the amplifier.
  • Clear previous Bluetooth pairings on both devices and try pairing again.
• Device Not Charging:
  • Verify the USB cable is connected to the 'CHARGE' port.
  • Try a different USB cable or power adapter.
  • Ensure the power source is functional.

9. Official Product Video

10. Warranty and Support

For warranty information and technical support, please refer to the documentation included with your product or contact LEAUDIO customer service directly. You may also visit the official LEAUDIO website for the most up-to-date support resources.